Now, to the shocking find inside a target store. A loaded gun sit right in the toy aisle. And police are trying, now, to figure out who put it there and why. ABC's Matt Gutman has the story. Reporter: There, among the pistol-packing action figures, was a real, steel, 9 millimeter Lugar pistol, with a full capacity of eight rounds. Very concerning, a loaded gun inside a children's section of a store, where any number of kids could have grabbed that and fired that gun off is very alarming. Reporter: The gun was discovered when a security guard saw the gun in plain view, on a marvel superhero playskool box. At first, he thought it, too, was a toy. Police released a picture of this man, who they say may be connected. According to the police report, he had been pacing around the toy aisle, although, the footage does not show him placing the gun there. It's the first of its type that I can think of in my 27 years in law enforcement. Reporter: Target, which does not sell firearms in its stores, released a statement saying, we take these matters very seriously and are partnering with law enforcement. But the group, moms against guns, are filing ads like these, to pressure the retailer to ban customers from carrying firearms into its stores. For "Good morning America," Matt Gutman, ABC news, Miami.

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